One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6)(7,13)(8,11)(9,12)(10,15)(14,19)(16,18)(17,20)(21,22,26,23,25,28,33,30)(24,27,32,29,31,34,36,35)(5,7)(6,10)(8,14)(9,15)(11,17)(12,13)(16,20)(18,19)(21,23,26,28,25,30,33,22)(24,29,32,34,31,35,36,27)(2,4)(5,8,9,16)(6,11,12,18)(7,14,15,20)(10,17,13,19)(21,24,25,31)(22,27,28,34)(23,29,30,35)(26,32,33,36)(7,15)(10,13)(14,20)(17,19)(22,28)(23,30)(24,31)(32,36) involution — undirected(6,12)(10,13)(11,18)(17,19)(22,28)(23,30)(27,34)(29,35) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.